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rectdrawer.py
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rectdrawer.py
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#dan lowe/ jonathan wrona
from xml.dom import minidom
from scipy import misc
import xml.etree.ElementTree as et
import matplotlib.pyplot as plt
import matplotlib.image as mpimg
import numpy as np
import math
import cv2
##############################################################
#
# ClickTracker2.py is a snippet of code for tracking the
# clicks that a user has made on an image and writing that
# data to an xml file. To test that xml file is named
# test.xml in the same folder as ClickTracker.py.
#
# This version of ClickTracker can update the file after
# each event or live.
#
# Author: Dan Lowe/Jonathan Wrona
#
##############################################################
class ClickTracker(object):
file_ = 'test.xml'
previous_pos_x = -1.0
previous_pos_y = -1.0
button_pressed = False
root = et.Element('data')
curr_event = et.Element('event')
brush_size = 10
def __init__(self, ax, file_):
self.showverts = True
self.figure = plt.figure(1)
self.file_ = file_
canvas = self.figure.canvas
canvas.mpl_connect('button_press_event', self.button_press_callback)
canvas.mpl_connect('button_release_event', self.button_release_callback)
#canvas.mpl_connect('motion_notify_event', self.on_move)
def button_press_callback(self, event):
if(event.button == 1 or event.button == 3):
self.button_pressed = True
self.curr_event = et.SubElement(self.root, 'event')
self.curr_event.set('button', get_mouse_button(event.button))
self.curr_event.set('size', str(self.brush_size))
current_pos_x = int(math.floor(event.xdata))
current_pos_y = int(math.floor(event.ydata))
coord = et.SubElement(self.curr_event, 'coord')
coord.set('x', str(current_pos_x))
coord.set('y', str(current_pos_y))
#UNCOMMENT IF UPDATING LIVE#
tree = et.ElementTree(self.root)
tree.write(self.file_)
has_two_points()
def button_release_callback(self, event):
self.button_pressed = False
previous_pos_x = -1.0
previous_pos_y = -1.0
if(len(self.curr_event.findall('coord')) <= 0):
self.root.remove(self.root[-1])
#UNCOMMENT IF UPDATING AFTER EACH EVENT$
#tree = et.ElementTree(self.root)
#tree.write(self.file_)
# def on_move(self, event):
# if(self.button_pressed):
# current_pos_x = int(math.floor(event.xdata))
# current_pos_y = int(math.floor(event.ydata))
# if(not(current_pos_x == self.previous_pos_x and current_pos_y == self.previous_pos_y)):
# print 'updating path'
# self.previous_pos_x = current_pos_x
# self.previous_pos_y = current_pos_y
# coord = et.SubElement(self.curr_event, 'coord')
# coord.set('x', str(current_pos_x))
# coord.set('y', str(current_pos_y))
# #UNCOMMENT IF UPDATING LIVE#
# tree = et.ElementTree(self.root)
# tree.write(self.file_)
# has_two_points()
def get_mouse_button(button):
if(button == 1):
return "left"
elif(button == 3):
return "right"
def has_two_points():
# xmldoc = minidom.parse('test.xml')
# itemlist = xmldoc.getElementsByTagName('event')
# if(itemlist.length > 1):
tree = et.parse('test.xml')
root = tree.getroot()
print len(list(root))
if(len(list(root)) %2 == 0):
pts = []
for neighbor in root.iter('coord'):
x = int(neighbor.get('x'))
y = int(neighbor.get('y'))
pts.append((x,y))
print 'img draw'
cv2.rectangle(img, pts[len(pts)-2], pts[len(pts)-1], (255), 8)
ax.images.pop()
ax.imshow(img)
plt.draw()
def click_demo():
f = open('test.xml', 'w')
f.close()
print 'img assign'
global img
#img = misc.lena()
origin = ''
img = mpimg.imread('zebra.jpg')
#img = np.random.uniform(255, 0, size=(100, 100))
global ax
ax = plt.subplot(111)
ax.imshow(img)
ct = ClickTracker(ax, 'test.xml')
plt.title('Choose two points for your rectange by left clicking')
plt.show()
# itemlist = xmldoc.getElementsByTagName('event')
# print len(itemList)
# print itemlist[0].attributes['left'].value
# for s in itemlist :
# print s.attributes['name'].value
####create rectangle
if __name__ == '__main__':
click_demo()